Miele Dishwasher F438 error
F438 is identified by Miele's official manual as the comfort door lock is obstructed by a heavy object in front of the machine. Follow the exact model-scoped checks and safety boundary below.
Reference source listed as Miele official commercial dishwasher operating instructions PFD 402-407.
Open official source ↗the comfort door lock is obstructed by a heavy object in front of the machine
Isolate the appliance when safe. Remove heavy objects from in front of the dishwasher and try the door once. Contact Miele Service if the automatic opening fault remains. Do not open fixed panels or test live circuits.
Typical symptoms
Likely causes
Start with the least invasive explanation and stop if the check requires internal electrical or sealed-system access.
Safe next steps
- 1Record the complete F438 display and the full Miele dishwasher model
- 2Confirm that the displayed code matches the linked official Miele source
- 3Remove heavy objects from in front of the dishwasher and try the door once. Contact Miele Service if the automatic opening fault remains.
- 4Stop and arrange model-specific service if F438 returns
Step-by-step repair
- 1Remove heavy objects from in front of the dishwasher and try the door once. Contact Miele Service if the automatic opening fault remains. No internal component replacement is verified from F438 alone.
Repair details
The published checks normally need no replacement part. Internal repair cost is model- and region-specific; obtain a written Miele service quote after diagnosis.
External checks take about 5–30 minutes; professional diagnosis and repair time depend on the exact model.
Exact Miele model number and official manual, No internal electrical test tool is permitted
No replacement part is confirmed by F438 alone. Confirm the exact model, failed component, and manufacturer part number before ordering.
What not to do
- Do not open fixed panels, test live electrical or sealed-system parts, bypass safety devices, or order a component solely from F438.
Preventive maintenance
- 1Keep user-accessible filters, spray arms, seals, water connections, and the drain path maintained according to the exact model manual.
Frequently asked questions
What does F438 mean?
Miele identifies it as the comfort door lock is obstructed by a heavy object in front of the machine.
Can I replace a part from the code alone?
No. Confirm the exact model and manufacturer diagnosis first.
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